1. Cloud sync would be great but I realize that it might pose technical challenges.
2. Using one device as the master is the obvious solution but it doesn't work for me: I do most of my editing on Mac but often modify files during practices - when I also don't have time to email myself the modified file.
3. So, until cloud sync arrives, how about tagging files with 'Last modified' date so that it's possible to work out which device has the most recent modification?

Great app! Love it!

Cheers,
Kevin